Improvement in slate-frame clamp



2 Sheets-Sheet 1.-

-J H. COFFIN. sLA'TB FRAME oLAMP.

v NQ. 102,656. FQI. Patented May 3,- 1870.`

zinsen-Sheet 2. J. H. GOFFIN.

ASLATE FRAME CLAMP.

No. 102,656.v fzlglz, Patented May 3, 1870.

ver.

'danni tznea wJAMES'H. COFFIN, 0F DANIELSVIL'LE, PENNSYLVANIA.

Letters Patent-No. 102,656, dated Mag/ 3, 1870; antezlated March 17, 1870.

IMPROVEMENT IN SLATE-IRAME CLAMP.

The Schedule referred` te in these Letters Patent and making part of the same.

To all whom it may concern with glue, without' pins. It may, however, be used with other frames, 'and with frames fastened in any manner.

In the annexed drawings- Figure 1 represents a perspective view of the niachine.

Figurel 2, a plan of the platform and frame-gauges.

Figure 3, a front side elevation, certain parts being omitted, the more clearly to show thel treadle j, adjustableupright lever c, and their connections.

Figure 4, an end elevation,` the frame of the machine being removed, and the treadlc j, upright lever c, and spring g being omitted, tbe'more clearly to eirhibit the hand-lever q, adjustable upright lever Jr, spring 0,-and their connections.

`a represents the frame.

b an upright post, to which the several voperating parts of the machiue are attached.

cfgs. 1 and 3, an upright adjust-able lever, which is connected by pins or bolts f with the horizontal perforated levers Zand e.

The lever c is adjusted by withdrawing pin j, mo'ving the lever toward or from post b, as desired, and then inserting pins f in the proper perforations.

g is a spring, which I prefer to make of elast-ic,

.similar to lever c.

It is connected by bolts or pins with the horizontal ,perforated'levexs 'in anda, which as well as spring o 'and stud p, are allsimilar `to levers and e, spring g,- and stud Il, respectively, and are emp oyed for similar purposes.

The lever l.: s connected by a. flexible joint to the hand-lever q, as shown.

In figs 1 and 2, r and s are stationary parts of the frame-gauge.

t and u are ,movable parts of the gauge, the' latter being applied, respectively, to the projectingends ot the upright levers c and la.

c represents a slate and frame inl position tobe acted on by the machine.

The edges of the slates having been first partially inserted in the grooves of their frames, they are laid on the plat-form of the'machine, against the stationary parts fr and s of the gauge. AThempVable parts tand 'n of the gauge are then either simultaneouslyor s uccessively brought up against the frame by the action of the hand and foot on the lever q and treadle 7. The pressure of the hand and foot being then removed or `snllciently lessened, the uprightlevers c and k, and movable parts t and a of the gauge are drawn back bytheaction' of the springs g and o. This completes Athe operation.

Both the movable 'gauges may be operated by the treadle j, the hand-lever 'i being properly connected therewith; but this is not always desirable, from the fact that in such cases the gauges t and u both move certain uniform distances, whereas it is frequent-lynecssary to move one gauge more than the other. 1 therefore .prefer to make the machine as represented.

By giving the gauge-pieces 1' s t u the required depth 'or thickness, one, two, three, or more slateframes maybe acted on at a single operation.

I claim as my invention- The combination of the leversfi, c, d, and e, 'springV y, levers k m n, spring o, and stationary and movable gauge-pieces 'r s t 1l, in the manner and for the purpose substantially as set forth.

. JAMES H. GOFFIN.

Witnesses:

GEORGE E. BUcxLEv, WILLIAM J. BURNS. 

